CN113330940A - Hand-held gardening, forest and/or construction equipment and operation method thereof - Google Patents
Hand-held gardening, forest and/or construction equipment and operation method thereof Download PDFInfo
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- CN113330940A CN113330940A CN202110178109.4A CN202110178109A CN113330940A CN 113330940 A CN113330940 A CN 113330940A CN 202110178109 A CN202110178109 A CN 202110178109A CN 113330940 A CN113330940 A CN 113330940A
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- rotational speed
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/04—Apparatus for trimming hedges, e.g. hedge shears
- A01G3/047—Apparatus for trimming hedges, e.g. hedge shears portable
- A01G3/053—Apparatus for trimming hedges, e.g. hedge shears portable motor-driven
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/08—Other tools for pruning, branching or delimbing standing trees
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
- A01G20/40—Apparatus for cleaning the lawn or grass surface
- A01G20/43—Apparatus for cleaning the lawn or grass surface for sweeping, collecting or disintegrating lawn debris
- A01G20/47—Vacuum or blower devices
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/06—Hand-held edge trimmers or shears for lawns
- A01G3/062—Motor-driven edge trimmers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/06—Hand-held edge trimmers or shears for lawns
- A01G3/067—Motor-driven shears for lawns
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G3/00—Cutting implements specially adapted for horticultural purposes; Delimbing standing trees
- A01G3/08—Other tools for pruning, branching or delimbing standing trees
- A01G3/085—Motor-driven saws for pruning or branching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D53/00—Machines or devices for sawing with strap saw-blades which are effectively endless in use, e.g. for contour cutting
- B23D53/12—Hand-held or hand-operated sawing devices working with strap saw blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D55/00—Sawing machines or sawing devices working with strap saw blades, characterised only by constructional features of particular parts
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B15/00—Systems controlled by a computer
- G05B15/02—Systems controlled by a computer electric
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
Abstract
The invention relates to a handheld gardening, forest and/or construction equipment and an operation method thereof, wherein the handheld gardening, forest and/or construction equipment (1) comprises: a machining tool (2); a motor drive system (3), wherein the motor drive system (3) is designed to drive the machining tool (2); a user-adjustable operating element (4); and a control device (5), wherein the control device (5) is designed to control the setpoint gradient (dn setpoint/dt) of the rotational speed (n) of the motor drive system (3) as a function of the position (ST) of the actuating element (4) in accordance with at least one relationship (ZO) such that the maximum setpoint gradient (maxdn setpoint/dt) of the rotational speed (n) differs for different positions (ST).
Description
Technical Field
The invention relates to a handheld gardening, forest and/or construction equipment (Bauberebietungsgeraet) and a method for operating such a handheld gardening, forest and/or construction equipment.
Background
The object of the invention is to provide a handheld gardening, forest and/or building processing device and a method for operating such a handheld gardening, forest and/or building processing device, which have improved properties.
Disclosure of Invention
The invention achieves this object by providing a handheld garden-, forest-and/or building processing appliance according to the invention and/or a method according to the invention. Advantageous developments and/or embodiments of the invention are specified in the dependent claims.
The handheld garden-, forest-and/or building processing appliance according to the invention comprises or has a processing tool, a motor drive system, a user-adjustable operating element and in particular an electrical control device. The motor drive system is configured or arranged to drive the processing tool. The control device is designed or configured to automatically control, in particular, a time-based theoretical slope (Soll-steady rate), in particular a theoretical slope or theoretical rate of rise (Soll-steady rate), or a value of theoretical acceleration of the rotational speed of the electric motor drive system, in particular, as a function of the position, in particular the value of the position, of the actuating element in accordance with or in correspondence with at least one correlation (zuorrdnung), such that, for different positions, in particular different values of the position, the time-based maximum theoretical slope or maximum theoretical rate of rise, or maximum theoretical acceleration of the rotational speed differs.
This achieves that the maximum theoretical slope can be adjusted differently, in particular low or high, by the user of the garden-, forest-and/or building processing appliance by means of different settings of the operating element. In particular, the maximum theoretical slope, which can be set at a lower value, enables a limitation or reduction or even avoidance of a twist, in particular a nodding (nickel), of the garden-, forest-and/or construction work implement, in particular when the electric motor drive system is started. In other words: this achieves a soft start. This therefore achieves a lower load or even no load on the user, in particular on the hand joints of the user. This therefore achieves a high comfort for the user. Additionally or alternatively, a higher adjustable maximum theoretical slope enables a rapid attainment of the desired rotational speed.
In particular, the gardening-, forest-and/or building processing appliances may be hand-held gardening-, forest-and/or building processing appliances. Additionally or alternatively, a handheld, in particular hand-held gardening-, forest-and/or building processing implement may mean that the gardening-, forest-and/or building processing implement may have a mass of at most 50 kilograms (kg), in particular at most 20kg, in particular at most 10kg, in particular at most 5kg and/or at least 1kg, in particular at least 2 kg.
The operating element can have at least three different positions. In particular, the operating element can be user-adjustable in a stepless manner.
The control device for controlling may be an adjusting device for adjusting. Additionally or alternatively, the control device may have a microcontroller.
The theoretical slope can be achieved in the unloaded state of the garden-, forest-and/or construction processing appliance, in particular of the motor drive system.
The correlation may be referred to as a theoretical slope limit or limit. Additionally or alternatively, the association may be fixedly adjusted or preset or not preset by the user at the factory side. Additionally or alternatively, the correlation may correlate different maximum theoretical slopes to different locations.
The different maximum theoretical slopes may be correspondingly greater than zero.
In a development of the invention, the control device is designed or configured to automatically control the set rotational speed, in particular the value of the set rotational speed and the set slope of the rotational speed, in accordance with the at least one correlation as a function of the position in order to achieve the set rotational speed of the electric motor drive system. In particular, the target rotational speed can be achieved in the unloaded state of the garden-, forest-and/or construction processing appliance, in particular of the electric motor drive system. In addition or alternatively, the correlation may relate at least one, in particular only one, set rotational speed, in particular only one, unique value of the set rotational speed, to the different positions. Additionally or alternatively, the theoretical rotational speed may be greater than zero.
In one embodiment of the invention, the control device is designed to control the setpoint rotational speed as a function of the position in accordance with the at least one correlation, such that the setpoint rotational speed, in particular the value of the setpoint rotational speed, differs for different positions, in particular different values of the position. This achieves that the theoretical rotational speed can be adjusted differently by the user by means of different settings of the operating element. In particular, the correlation may relate different theoretical rotational speeds to different positions. Additionally or alternatively, the different theoretical rotational speeds may be correspondingly greater than zero.
In one embodiment of the invention, the control device is designed to control the setpoint rotational speed in accordance with the at least one correlation such that the value of the minimum setpoint rotational speed, in particular of the minimum setpoint rotational speed, is at least 0.1 times, in particular at least 0.2 times, in particular at least 0.3 times, the value of the maximum setpoint rotational speed, in particular of the maximum setpoint rotational speed. This ensures that the machining tool is always driven at a rotational speed at which it can be machined as intended. On the other hand, the maximum setpoint slope, which can be set lower, in particular differs from the higher maximum setpoint slope, makes it possible to reduce the speed jump (Drehzahlsprung) (caused by the minimum setpoint speed) in its influence in a manner that reduces it when the electric motor drive system is started. In particular, the correlation may relate the minimum theoretical rotational speed by a minimum of 0.1 times, in particular a minimum of 0.2 times, in particular a minimum of 0.3 times, the maximum theoretical rotational speed. Additionally or alternatively, the minimum theoretical rotational speed may be equal to the maximum theoretical rotational speed.
In one embodiment of the invention, the control device is designed or configured to detect, in particular automatically, the actual rotational speed of the electric motor drive system, in particular the value of the actual rotational speed. The control device is also designed or configured to determine a rotational speed deviation, in particular a value of the rotational speed deviation, in particular a rotational speed difference, in particular automatically, by means of a comparison of the detected actual rotational speed and a set rotational speed, in particular by means of a subtraction of the actual rotational speed from the set rotational speed. The control device is also designed or configured to control, in particular automatically, in accordance with the at least one correlation, in such a way that the value of the set slope, in particular of the set slope, is lower than the value of the maximum set slope, in particular of the maximum set slope, when a deviation limit value is reached and/or exceeded by the determined rotational speed deviation, and when the deviation limit value is undershot by the determined rotational speed deviation, in particular relative to the value of the maximum set slope. This achieves reaching the theoretical rotational speed. In particular, the deviation limit value can be independent of the position and/or different from zero. Additionally or alternatively, the deviation limit value may be equal to or lower than the minimum theoretical rotational speed (if present).
In one embodiment of the invention, the control device is designed to control the operating element in accordance with the at least one relationship in such a way that the value of the target rotational speed, in particular of the target rotational speed, increases or increases over the adjustment range, in particular the adjustment path, of the operating element from its starting position to its maximum position from a value, in particular a minimum target rotational speed, to a value, in particular a maximum target rotational speed. The increase, in particular the value of the increase or increase, changes by at most 20 percent (%) or not for every minimum 0.2 times the adjustment range. In other words: the target rotational speed increases linearly from a minimum target rotational speed to a maximum target rotational speed over an adjustment range from its starting position to its maximum position. This achieves that the theoretical rotational speed can be finely adjusted by the user. In particular, the starting position can be different from the minimum position or the closed position (Aus-Stellung) of the operating element.
In a refinement, in particular in a configuration, of the invention, the control device is designed to control in accordance with the at least one correlation in such a way that for smaller positions or starting positions the value of the maximum theoretical slope, in particular of the maximum theoretical slope, is lower, in particular minimum, in particular and the value of the theoretical rotational speed, in particular of the theoretical rotational speed, is lower, in particular minimum, while for larger positions or maximum positions the value of the maximum theoretical slope, in particular of the maximum theoretical slope, is higher, in particular maximum, in particular and the value of the theoretical rotational speed, in particular of the theoretical rotational speed, is higher, in particular maximum. This achieves that the maximum theoretical slope and in particular the theoretical rotational speed can be intuitively adjusted by the user accordingly. In particular, the correlation may correlate a lower maximum theoretical slope, in particular a lower theoretical rotational speed, to a smaller position and a higher maximum theoretical slope, in particular a higher theoretical rotational speed, to a larger position.
In one embodiment of the invention, the transition or increase from the lower maximum theoretical slope to the higher maximum theoretical slope extends over a setting range of the actuating element, in particular over a minimum of 0.1, in particular 0.2, in particular 0.3 times the setting travel. In addition or alternatively, a transition or increase from a lower maximum theoretical slope to a higher maximum theoretical slope, in particular the transition or increase, begins at half, in particular at a quarter, of the maximum position of the operating element. This, in particular the extension achieves that the transition can be gentle or smooth. Additionally or alternatively, this, in particular the starting, enables the transition to be effected quickly.
In a development of the invention, the control device is designed or configured to automatically control, in particular temporally, the second-order theoretical slope, in particular the value of the second-order theoretical slope, or the second-order theoretical rate of rise of the theoretical slope, depending on the position of the actuating element, in accordance with the at least one correlation, in such a way that, for different positions, in particular different values of the position, the second-order maximum theoretical slope, in particular the value of the second-order maximum theoretical slope, or the second-order maximum theoretical rate of rise of the theoretical slope, in particular temporally, differs. This makes it possible for the second-order maximum theoretical slope to be adjusted differently, in particular lower or higher, by the user by different settings of the operating element. In particular, the second-order maximum theoretical slope, which can be set lower, makes it possible to limit or reduce or even avoid wobbling (rock) of the garden-, forest-and/or construction work apparatus, in particular when the motor drive system is started. In other words: this achieves a soft start. This therefore achieves a lower load or even no load for the user. Additionally or alternatively, a higher adjustable second-order maximum theoretical slope enables a desired rotational speed to be reached quickly. In particular, the theoretical slope may be referred to as the first derivative in time of the rotational speed and the second theoretical slope may be referred to as the second derivative in time of the rotational speed. Additionally or alternatively, the second order theoretical slope can be achieved in the unloaded state of the gardening, forest and/or construction equipment, in particular the motor drive system. Additionally or alternatively, the correlation may correlate different second order maximum theoretical slopes to different locations. Additionally or alternatively, the different second order maximum theoretical slopes may be correspondingly greater than zero.
In a development of the invention, the control device is designed or configured to detect, in particular automatically, an adjustment duration, in particular a value of the adjustment duration, and/or an adjustment speed, in particular a value of the adjustment speed, of the adjustment of the operating element. The control device is furthermore designed or configured to control, in particular automatically, in accordance with the correlation when the duration limit value is reached and/or exceeded by the detected adjustment duration and/or when the speed limit value is reached and/or undershot by the detected adjustment speed. Furthermore, the control device is designed or configured to control, in particular automatically, according to a further correlation if the detected adjustment duration is below the duration limit value and/or if the detected adjustment speed exceeds the speed limit value, in such a way that the maximum theoretical slope is higher, in particular maximum, for at least one of the different positions, in particular for at least one of the different values of the position, than according to the correlation. This achieves that the correlation or the lower maximum theoretical slope or the further correlation or the higher maximum theoretical slope can be adjusted by the user by a not equally fast adjustment of the operating element. In particular, the maximum theoretical slope, which can be adjusted relatively high, enables the desired rotational speed to be reached quickly. In particular, the further correlation may correlate at least one of the different positions with respect to a maximum theoretical slope that is higher according to the correlation. Additionally or alternatively, a control according to a further relationship, in particular the further relationship, may furthermore correspond to, in particular be identical to, a control according to the relationship, in particular the relationship.
In a development of the invention, the gardening, forest and/or construction equipment comprises or has a potentiometer. The operating element is designed or configured to adjust the value of an electrical variable of the potentiometer. The control device is designed or configured to control the theoretical slope as a function of the value of the variable in accordance with the at least one correlation, such that the maximum theoretical slope of the rotational speed differs for different values of the variable. This enables position dependent control. In particular, the potentiometer may have a hall sensor and/or the variable may be a hall voltage. Further alternatively, the parameter may be a resistance. Additionally or alternatively, the correlation may correlate different maximum theoretical slopes to different values of the parameter.
In a development of the invention, the control device is designed or configured to control the torque, in particular the value of the torque, generated by the electric motor drive system, in particular automatically, in order to achieve the setpoint slope. This enables control of the theoretical slope.
In a development of the invention, the gardening, forest and/or construction work implement is a saw, a pole trimmer (Hoch-operator), a free cutter (Freischneider), a blower, a leaf blower (Laubbl ä ser) or a cutter (trennscheleifer).
The method according to the invention is designed or configured for operating a handheld garden, forest and/or building processing device, in particular as described above. The method comprises or has the steps of: the control device thus controls, in particular automatically, the setpoint slope of the rotational speed of the electric motor drive system as a function of the position of the actuating element in accordance with the at least one correlation, such that the maximum setpoint slope of the rotational speed differs for different positions.
Drawings
Further advantages and aspects of the invention emerge from the claims and from the following description of preferred embodiments of the invention, which is set forth below with reference to the drawings. Wherein:
figure 1 schematically shows a hand-held gardening-, forest-and/or building processing appliance according to the invention,
fig. 2 schematically shows the control device of the gardening-, forest-and/or building processing implement of fig. 1 and the method according to the invention for operating the gardening-, forest-and/or building processing implement of fig. 1,
FIG. 3 shows a diagram of the maximum theoretical slope of the rotational speed with respect to the theoretical rotational speed of the motor drive system of the garden-, forest-and/or building processing appliance of FIG. 1 and with respect to the value of the electrical variable of the potentiometer of the garden-, forest-and/or building processing appliance of FIG. 1,
figure 4 shows a further graph of the maximum theoretical slope with respect to the theoretical rotational speed,
figure 5 shows a further graph of the maximum theoretical slope with respect to the theoretical rotational speed,
figure 6 shows a further graph of the maximum theoretical slope with respect to the theoretical rotational speed,
figure 7 shows a graph of the maximum theoretical slope offset versus the theoretical rotational speed,
FIG. 8 shows a graph of the second-order maximum theoretical slope of the theoretical slope with respect to the theoretical rotational speed, an
Fig. 9 shows a graph of the second order maximum theoretical offset with respect to the theoretical rotational speed.
Detailed Description
Fig. 1 shows a hand-held gardening-, forest-and/or construction equipment 1 according to the invention. The garden-, forest-and/or building processing appliance 1 has a processing tool 2, a motor drive system 3, a user-adjustable operating element 4 and a control device 5. The motor drive system 3 is designed, in particular, to drive a machine tool 2. The control device 5 is designed, in particular controls, for controlling the setpoint slope dn setpoint/dt of the rotational speed n of the electric motor drive 3 as a function of the position of the actuating element 4 in accordance with at least one correlation ZO, as shown in fig. 2, such that the maximum setpoint slope maxdn setpoint/dt of the rotational speed n differs for different positions ST, as shown in fig. 3 to 6.
Fig. 2 shows a method according to the invention for operating a handheld garden-, forest-and/or building processing appliance 1. The method comprises the following steps: in this way, the control device 5 controls the setpoint slope dn setpoint/dt of the rotational speed n of the motor drive 3 as a function of the position ST of the actuating element 4 in accordance with the at least one correlation ZO such that the maximum setpoint slope maxdn setpoint/dt of the rotational speed n differs for different positions ST.
In the illustrated embodiment, the gardening-, forest-and/or construction work implement 1 is a saw 1'. In alternative embodiments, the gardening-, forest-and/or building processing appliances 1 can be a pole trimmer, a free cutter, a blower, a leaf blower or a cutter.
Furthermore, the control device 1 is configured, in particular controlled, for controlling the torque M generated by the motor drive 3 to reach the setpoint slope dn setpoint/dt.
Furthermore, in the exemplary embodiment shown, the garden-, forest-and/or building processing appliance 1 has a potentiometer 6. The operating element 4 is designed, in particular, to set a value WG for adjusting an electrical variable G of the potentiometer 6. The control device 5 is designed, in particular controlled, to control the setpoint slope dn setpoint/dt as a function of the value WG of the variable G in accordance with the at least one correlation ZO such that the maximum setpoint slope maxdn setpoint/dt of the rotational speed n differs for different values WG of the variable G.
In an alternative embodiment, the gardening-, forest-and/or building processing appliance 1 has at least two switches, wherein the operating element can be configured to adjust the switches, wherein the control device can be configured to control the theoretical slope dn theory/dt according to the at least one correlation depending on the respective switch position of the switches, such that the maximum theoretical slope of the rotational speed can be different for different switch positions.
In particular, in the exemplary embodiment shown, the potentiometer 6 has a hall sensor 6' and the variable G is the hall voltage UH.
Furthermore, the control device 5 is designed, in particular, to detect the control period STt and/or the control speed STv for detecting a control of the actuating element 4, in particular the value WG of the variable G. Furthermore, the control device 5 is designed, in particular, to control the dependence ZO when the detected adjustment duration STt reaches and/or exceeds the duration limit value tfold and/or when the detected adjustment speed STv reaches and/or falls below the speed limit value vfold. Furthermore, the control device 5 is designed, in particular controlled, to control the further relationship ZO' if the detected adjustment duration STt falls below the duration limit value tfold and/or if the detected adjustment speed STv exceeds the speed limit value vfold, such that the maximum theoretical slope maxdn theory/dt is higher, in particular maximum, for at least one of the different positions ST than for the relationship ZO, as shown in fig. 3.
In the exemplary embodiment shown, the maximum theoretical slope maxdn theory/dt is greater for smaller positions SST, in particular for smaller values SWG of the variable G, than for the correlation ZO. For larger positions maxST, in particular larger values maxgg of the variable G, the maximum theoretical slope maxdn theoretical/dt is equal to ZO, in particular maximum, according to the correlation.
Furthermore, the further relationship ZO' is equivalent to the relationship ZO.
In particular, the further correlation ZO' may be the correlation ZO plus an offset, in particular a maximum theoretical slope offset, which depends in particular on the position.
FIG. 7 shows further possible offsets ZO ' ', ZO ' ' ' ' '.
Furthermore, the control device 5 is designed, in particular controlled, to control the setpoint rotational speed nrotary and the setpoint slope dn setpoint/dt of the rotational speed n as a function of the position ST, in particular the value WG, in accordance with the at least one correlation ZO, in particular or a further correlation ZO', in order to achieve the setpoint rotational speed nrotary of the electric motor drive 3.
In detail, the control device 5 is designed, in particular controlled, to control the setpoint rotational speed theories in accordance with the at least one correlation, ZO, in particular the further correlation ZO', depending on the position ST, in particular the value WG, such that the setpoint rotational speed theories differ for different positions ST, in particular different values WG of the variable G.
Furthermore, the control device 5 is designed, in particular controlled, to control the setpoint rotational speed n theory according to the at least one correlation ZO, in particular the further correlation ZO', such that the minimum setpoint rotational speed minn theory is a minimum of 0.1 times the maximum setpoint rotational speed maxn theory.
In the illustrated embodiment, the minimum theoretical rotational speed minn is 4500 revolutions per minute (U/min) theoretically. Additionally, the maximum theoretical rotational speed maxn is 13000U/min theoretically.
Furthermore, the control device 5 is designed, in particular, to detect the actual rotational speed ncalcai of the electric motor drive 3. Furthermore, the control device 5 is designed, in particular, to determine a rotational speed offset Δ n by means of a mutual comparison of the detected actual rotational speed ncalcai and the setpoint rotational speed nxai. Furthermore, the control device 5 is configured, in particular controlled, to control in accordance with the at least one correlation ZO, in particular the further correlation ZO', such that the theoretical slope dn theory/dt is lower with respect to the maximum theoretical slope maxdn theory/dt when the deviation limit is reached and/or exceeded by the measured rotational speed deviation Δ n and when the deviation limit is lower than the deviation limit n limit by the measured rotational speed deviation Δ n.
In particular, the control device 5 for controlling is a regulating device 5' for regulating.
In the exemplary embodiment shown, the control device 5' has a rotational speed controller 5 ″ and a current controller 5 ″.
In addition, the deviation limit value Δ n is equal to or lower than the minimum theoretical rotational speed minn theory.
Furthermore, the control device 5 is designed, in particular controlled, to control in accordance with the at least one relationship ZO, in particular the further relationship ZO', in such a way that the target rotational speed nxn is theoretically increased from the minimum target rotational speed minn to the maximum target rotational speed maxn over a control range STB of the actuating element 4, in particular of the value WG, from its starting position SST, in particular of the starting value SWG of the variable G, up to its maximum position maxST, in particular of the maximum value maxgg of the variable G. For every 0.2-fold minimum of the regulatory range STB, the increase ZU changes by 20(%) maximum or no change.
In the exemplary embodiment shown, the starting position SST, in particular the starting value SWG, differs from the minimum position minST of the actuating element 4, in particular the minimum value minWG of the variable G.
In particular, the starting position SST, in particular the starting value SWG, is 10%. Additionally, the maximum position maxST, in particular the maximum value maxWG, is 100%. Additionally, the minimum position minST, in particular the minimum value minWG, is 0%.
Furthermore, the control device 5 is designed, in particular controlled, to control in accordance with the at least one correlation ZO such that for smaller positions or starting positions SST, in particular smaller values or starting values SWG, the maximum theoretical slope maxdn theory/dt is lower, in particular the minimum or the minimum maximum theoretical slope minmaxdn theory/dt, while for larger positions or maximum positions maxST, in particular larger values or maximum maxgg, the maximum theoretical slope maxdn theory/dt is higher, in particular the maximum or the maximum theoretical slope maxmadn theory/dt.
In the illustrated embodiment, the minimum maximum theoretical slope minmaxdn theory/dt is 50U/min every 10 milliseconds (ms). Additionally, the maximum theoretical maximum slope maxmaxdn theory/dt is 2000U/min every 10 ms.
In particular, the maximum theoretical slope maxmaxdn theoretical/dt is higher than the maximum attainable slope maxdn/t of the rotational speed n, in the illustrated embodiment 950U/min every 10 ms. The maximum attainable slope maxdn/t is limited by the maximum attainable torque maxM produced by the motor drive system 3.
Furthermore, the control device 5 is designed, in particular controlled, to control in accordance with the at least one correlation ZO, in particular the further correlation ZO', in such a way that for smaller positions or starting positions SST, in particular smaller values or starting values SWG, the setpoint rotational speed nxtheory is lower, in particular the minimum or minimum setpoint rotational speed minn theory, and for larger positions or maximum positions maxsst, in particular larger values or maximum maxWG, the setpoint rotational speed nxtheory is higher, in particular the maximum or maximum setpoint rotational speed maxn theory.
Furthermore, as shown in fig. 3, 5 and 6, the transition UG from the lower or minimum maximum theoretical slope minmaxdn theory/dt to the higher or maximum theoretical slope maxmadn theory/dt extends over a minimum of 0.1 times the adjustment range STB of the operating element 4, in particular of the value WG.
An alternative, in particular harder, transition is shown in fig. 4.
Additionally, as shown in fig. 3, 5 and 6, the transition UG from the lower or minimum maximum theoretical slope minmaxdn theory/dt to the higher or maximum theoretical slope maxmadn theory/dt begins at half the maximum position maxST of the operating element 4, in particular at half the maximum value maxgg.
In particular, the transition UG shown in fig. 3 acts in a wider range and is softer between a weaker and a stronger acceleration, but because of the time required for the adjustment, the time to accelerate to a higher rotational speed is lost.
The transition UG shown in fig. 4 acts in a wider range, but because of the time required for the regulation, the time to accelerate to a higher rotational speed is lost, and the transition is harder.
The transition shown in fig. 5 enables a fast acceleration and is softer for higher accelerations, but requires a sensitive adjustment to achieve the effect.
The transition shown in fig. 6 is active in a wider range and is very gentle between the weaker and stronger accelerations, but the weaker acceleration is slower.
Furthermore, as shown in fig. 8, the control device 5 is configured, in particular to control, the second-order theoretical slope d n theory/dt for controlling the theoretical slope dn theory/dt in accordance with the position ST, in particular the value WG, of the operating element 4 in accordance with the at least one correlation ZO such that the second-order maximum theoretical slope maxd n theory/dt of the theoretical slope dn theory/dt is different for different positions ST, in particular different values WG.
In particular, the control apparatus 5 is constructed, in particular controlled, for controlling in accordance with the at least one association ZO such that for smaller positions or start positions SST, in particular smaller values or start values SWG, the second-order theoretical slopes d n theory/dt are lower, in particular minimum or minimum second-order theoretical slopes mind n theory/dt, whereas for larger positions or maximum positions maxST, in particular larger values or maximum values maxWG, the second-order theoretical slopes d n theory/dt are higher, in particular maximum or maximum second-order theoretical slopes maxd n theory/dt.
Additionally or alternatively, the further correlation ZO' may be the correlation ZO plus a shift, in particular a position-dependent shift, in particular a second-order maximum theoretical slope shift.
FIG. 9 shows further possible offsets ZO ' ', ZO ' ' ' ' '.
In the exemplary embodiment shown, the garden-, forest-and/or building processing appliance 1 is designed for electrical connection, in particular is electrically connected, to an accumulator 10. In an alternative embodiment, the garden-, forest-and/or building processing appliance may additionally or alternatively be configured for electrical connection with a cable.
As the exemplary embodiments shown and described above show, the invention provides an advantageous handheld garden-, forest-and/or building processing appliance and a method for operating such a handheld garden-, forest-and/or building processing appliance, which accordingly have improved properties.
Claims (14)
1. A handheld garden-, forest-and/or building processing appliance (1), wherein the handheld garden-, forest-and/or building processing appliance (1) has:
-a machining tool (2),
-a motor drive system (3), wherein the motor drive system (3) is configured for driving the machining tool (2),
-a user-adjustable operating element (4), and
-a control device (5), wherein the control device (5) is configured for controlling a theoretical slope (dn theory/dt) of a rotational speed (n) of the motor drive system (3) as a function of a position (ST) of the operating element (4) in accordance with at least one correlation (ZO) such that a maximum theoretical slope (maxdn theory/dt) of the rotational speed (n) differs for different positions (ST).
2. Hand-held gardening-, forest-and/or building processing appliance (1) according to claim 1,
-wherein the control device (5) is configured for controlling a theoretical rotational speed (ndir) and a theoretical slope (dn theory/dt) of the rotational speed (n) to reach a theoretical rotational speed (ndir) of the motor drive system (3) as a function of the position (ST) in accordance with the at least one correlation (ZO).
3. Hand-held gardening-, forest-and/or building processing appliance (1) according to claim 2,
-wherein the control device (5) is configured for controlling the theoretical rotational speed (nti) as a function of the position (ST) in accordance with the at least one correlation (ZO) such that the theoretical rotational speed (nti) differs for different positions (ST).
4. Hand-held gardening-, forest-and/or building processing equipment (1) according to claim 2 or 3,
-wherein the control device (5) is configured to control the theoretical rotational speed (nditheoretical) according to the at least one correlation (ZO) such that the minimum theoretical rotational speed (minn theoretical) is at least 0.1 times, in particular at least 0.2 times, in particular at least 0.3 times the maximum theoretical rotational speed (maxntheoretical).
5. The hand-held garden-, forest-and/or building processing appliance (1) according to any one of claims 2 to 4,
-wherein the control device (5) is configured for detecting an actual rotational speed (ncat) of the electric motor drive system (3), for determining a rotational speed deviation (Δ n) by means of a mutual comparison of the detected actual rotational speed (ncat) and the theoretical rotational speed (npat), and in particular to be controlled in accordance with the at least one correlation (ZO) such that the theoretical slope (dn) is lower with respect to the maximum theoretical slope (maxdn theory/dt) in the case that a deviation limit value (Δ n limit) is reached and/or exceeded by the determined rotational speed deviation (Δ n) and in the case that the determined rotational speed deviation (Δ n) is lower than the deviation limit (Δ n limit).
6. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of claims 2 to 5,
-wherein the control device (5) is configured to control according to the at least one correlation (ZO) such that the setpoint rotational speed (theoric) increases from a minimum setpoint rotational speed (minn theoric) up to a maximum setpoint rotational speed (maxn theoric) over an adjustment range (STB) of the operating element (4) from its starting position (SST) up to its maximum position (maxST), wherein the increase (ZU) changes by a maximum of 20% or not for every minimum 0.2 times the adjustment range (STB).
7. Hand-held garden-, forest-and/or building processing appliance (1) according to any of the preceding claims, in particular according to any of claims 2 to 6,
-wherein the control device (5) is configured for controlling in accordance with the at least one correlation (ZO) such that for smaller positions (SST) the maximum theoretical slope (maxdn theory/dt) is lower, in particular the theoretical rotational speed (nditicular) is lower, and for larger positions (maxST) the maximum theoretical slope (maxdn theory/dt) is higher, in particular the theoretical rotational speed (nditicular) is higher.
8. Hand-held gardening-, forest-and/or building processing appliance (1) according to claim 7,
-wherein the transition (UG) from the lower maximum theoretical slope (minmaxdn theory/dt) to the higher maximum theoretical slope (maxmaxdn theory/dt) extends over a minimum of 0.1, in particular 0.2, in particular 0.3 times the adjustment range (STB) of the operating element (4) and/or
-wherein the transition (UG) from the lower maximum theoretical slope (minmaxdn theory/dt) to the higher maximum theoretical slope (maxmaxdn theory/dt) starts at the half, in particular the quarter maximum position (maxST), of the operating element (4) at the maximum.
9. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of the preceding claims,
-wherein the control device (5) is configured for controlling second-order theoretical slopes (dn theory/dt) of the theoretical slopes (dn theory/dt) in accordance with the position (ST) of the operational element (4) in accordance with the at least one correlation (ZO) such that second-order maximum theoretical slopes (maxd n theory/dt) of the theoretical slopes (dn theory/dt) are different for different positions (ST).
10. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of the preceding claims,
-wherein the control device (5) is configured to detect an adjustment duration (STt) and/or an adjustment speed (STv) of the adjustment of the operating element (4), and
-for controlling according to the correlation (ZO) when the duration limit value (tfmit) is reached and/or exceeded by the detected adjustment duration (STt) and/or when the speed limit value (vtmit) is reached and/or fallen below by the detected adjustment speed (STv), and
-for controlling according to a further correlation (ZO') when the detected adjustment duration (STt) is below the duration limit value (tend) and/or when the detected adjustment speed (STv) exceeds the speed limit value (tend), such that for at least one of the different positions (ST) the maximum theoretical slope (maxdn theory/dt) is higher, in particular maximum, than according to the correlation (ZO).
11. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of the preceding claims,
-wherein the gardening-, forest-and/or building processing appliances (1) have a potentiometer (6),
-wherein the operating element (4) is configured for adjusting a value (WG) of an electrical parameter (G) of the potentiometer (6), and
-wherein the control device (5) is configured for controlling the theoretical slope (dn theory/dt) as a function of the value (WG) of the variable (G) in accordance with the at least one correlation (ZO) such that the maximum theoretical slope (maxdn theory/dt) of the rotational speed (n) differs for different values (WG) of the variable (G).
12. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of the preceding claims,
-wherein the control device (5) is configured for controlling the torque (M) generated by the electric motor drive system (3) to reach the theoretical slope (dn theoretical/dt).
13. Hand-held gardening-, forest-and/or building processing implement (1) according to anyone of the preceding claims,
-wherein the gardening-, forest-and/or building processing appliances (1) are saws (1'), pole trimmers, free cutters, blowers, leaf blowers or cutters.
14. A method for operating a handheld garden-, forest-and/or building processing appliance (1) according to any one of the preceding claims, wherein the method has the following steps:
-controlling, by means of the control device (5), the theoretical slope (dn theory/dt) of the rotational speed (n) of the motor drive system (3) according to the position (ST) of the operating element (4) in accordance with the at least one correlation (ZO) such that the maximum theoretical slope (maxdn theory/dt) of the rotational speed (n) differs for the different positions (ST).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20157359.9 | 2020-02-14 | ||
| EP20157359.9A EP3864956B1 (en) | 2020-02-14 | 2020-02-14 | Manually guided garden, forestry and / or construction machinery and method for operating manually guided garden, forestry and / or construction machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113330940A true CN113330940A (en) | 2021-09-03 |
Family
ID=69593611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110178109.4A Pending CN113330940A (en) | 2020-02-14 | 2021-02-09 | Hand-held gardening, forest and/or construction equipment and operation method thereof |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20210251151A1 (en) |
| EP (1) | EP3864956B1 (en) |
| CN (1) | CN113330940A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3881992A1 (en) * | 2020-03-20 | 2021-09-22 | Andreas Stihl AG & Co. KG | Manually guided gardening, forestry and / or construction machinery and method for operating manually guided gardening, forestry and / or construction machinery |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5408535B2 (en) * | 2009-07-10 | 2014-02-05 | 日立工機株式会社 | Electric tool |
| US9930834B2 (en) * | 2015-10-29 | 2018-04-03 | Deere & Company | Agricultural baler control system |
| DE102016220716A1 (en) * | 2016-10-21 | 2018-04-26 | Robert Bosch Gmbh | Method for controlling a rotational speed of an electric motor of a power tool |
| SE1850245A1 (en) * | 2018-03-07 | 2019-09-08 | Husqvarna Ab | A power tool configured to operate in low-noise mode |
| EP3815509B1 (en) * | 2019-10-29 | 2024-04-17 | Andreas Stihl AG & Co. KG | Manually guided garden, forestry and / or construction machinery and method for a manually guided garden, forestry and / or construction machinery |
-
2020
- 2020-02-14 EP EP20157359.9A patent/EP3864956B1/en active Active
-
2021
- 2021-02-09 CN CN202110178109.4A patent/CN113330940A/en active Pending
- 2021-02-12 US US17/175,362 patent/US20210251151A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP3864956B1 (en) | 2022-12-14 |
| EP3864956A1 (en) | 2021-08-18 |
| US20210251151A1 (en) | 2021-08-19 |
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